Earnings Per Share / Common Unit (Tables)

9 Months Ended

Sep. 30, 2020

Entity Information [Line Items]

Computation Of Basic And Diluted Earnings Per Share / Unit

	Three months ended September 30, 2020
	Income (Numerator)		Shares (Denominator)	Per Share Amount
	(in thousands, except for per share amounts)
Basic Earnings:
Net income attributable to Boston Properties, Inc. common shareholders	$	89,854	155,645	$	0.58
Effect of Dilutive Securities:
Stock Based Compensation	—		25	—
Diluted Earnings:
Net income attributable to Boston Properties, Inc. common shareholders	$	89,854	155,670	$	0.58
	Three months ended September 30, 2019
	Income (Numerator)		Shares (Denominator)	Per Share Amount
	(in thousands, except for per share amounts)
Basic Earnings:
Net income attributable to Boston Properties, Inc. common shareholders	$	107,771	154,577	$	0.70
Effect of Dilutive Securities:
Stock Based Compensation	—		243	—
Diluted Earnings:
Net income attributable to Boston Properties, Inc. common shareholders	$	107,771	154,820	$	0.70

	Nine months ended September 30, 2020
	Income (Numerator)		Shares (Denominator)	Per Share Amount
	(in thousands, except for per share amounts)
Basic Earnings:
Net income attributable to Boston Properties, Inc. common shareholders	$	854,541	155,349	$	5.50
Allocation of undistributed earnings to participating securities	(1,150)		—	(0.01)
Net income attributable to Boston Properties, Inc. common shareholders	$	853,391	155,349	$	5.49
Effect of Dilutive Securities:
Stock Based Compensation	—		98	—
Diluted Earnings:
Net income attributable to Boston Properties, Inc. common shareholders	$	853,391	155,447	$	5.49
	Nine months ended September 30, 2019
	Income (Numerator)		Shares (Denominator)	Per Share Amount
	(in thousands, except for per share amounts)
Basic Earnings:
Net income attributable to Boston Properties, Inc. common shareholders	$	370,200	154,553	$	2.40
Effect of Dilutive Securities:
Stock Based Compensation	—		294	(0.01)
Diluted Earnings:
Net income attributable to Boston Properties, Inc. common shareholders	$	370,200	154,847	$	2.39

Boston Properties Limited Partnership

Entity Information [Line Items]

Computation Of Basic And Diluted Earnings Per Share / Unit

Included in the number of units (the denominator) below are approximately 17,032,000 and 17,638,000 redeemable common units for the three months ended September 30, 2020 and 2019, respectively, and 17,279,000 and 17,630,000 redeemable common units for the nine months ended September 30, 2020 and 2019, respectively.

	Three months ended September 30, 2020
	Income (Numerator)		Units (Denominator)	Per Unit Amount
	(in thousands, except for per unit amounts)
Basic Earnings:
Net income attributable to Boston Properties Limited Partnership common unitholders	$	101,624	172,677	$	0.59
Effect of Dilutive Securities:
Stock Based Compensation	—		25	—
Diluted Earnings:
Net income attributable to Boston Properties Limited Partnership common unitholders	$	101,624	172,702	$	0.59
	Three months ended September 30, 2019
	Income (Numerator)		Units (Denominator)	Per Unit Amount
	(in thousands, except for per unit amounts)
Basic Earnings:
Net income attributable to Boston Properties Limited Partnership common unitholders	$	122,117	172,215	$	0.71
Effect of Dilutive Securities:
Stock Based Compensation	—		243	—
Diluted Earnings:
Net income attributable to Boston Properties Limited Partnership common unitholders	$	122,117	172,458	$	0.71

	Nine months ended September 30, 2020
	Income (Numerator)		Units (Denominator)	Per Unit Amount
	(in thousands, except for per unit amounts)
Basic Earnings:
Net income attributable to Boston Properties Limited Partnership common unitholders	$	969,932	172,628	$	5.62
Allocation of undistributed earnings to participating securities	(1,278)		—	(0.01)
Net income attributable to Boston Properties Limited Partnership common unitholders	$	968,654	172,628	$	5.61
Effect of Dilutive Securities:
Stock Based Compensation	—		98	—
Diluted Earnings:
Net income attributable to Boston Properties Limited Partnership common unitholders	$	968,654	172,726	$	5.61

	Nine months ended September 30, 2019
	Income (Numerator)		Units (Denominator)	Per Unit Amount
	(in thousands, except for per unit amounts)
Basic Earnings:
Net income attributable to Boston Properties Limited Partnership common unitholders	$	421,214	172,183	$	2.45
Effect of Dilutive Securities:
Stock Based Compensation	—		294	(0.01)
Diluted Earnings:
Net income attributable to Boston Properties Limited Partnership common unitholders	$	421,214	172,477	$	2.44